Prelox from LifeExtension is a targeted dietary supplement for men's sexual health. One of the often overlooked aspects of male sexual health is vascular health. Healthy blood flow is essential to men's sexual capacity, and LifeExtension has discovered supportive clinical research for a scientifically validated, natural dietary supplement formula to promote endothelial function and blood flow to the place men need it more for maximum performance. This formula features Pycnogenol and l-arginine and contains no milk, egg, fish, peanuts, crustacean shellfish (lobster, crab, shrimp), soybeans, tree nuts, wheat, yeast, gluten, rice, sugar, and no artificial sweeteners, flavors, colors, or preservatives.